Stud-setting machinery.



No. 702,934. Patented June 24, I902.

F. A. EBRINGTON.

STUD SETTING MACHINERY.

(Application filed Jan. 23, 19011 (No Model.)

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UNITED STATES PATENT OF ICE.

FRANKLIN A. ERRINGTON, OF NEV YORK, N. Y.

STUD-SETTING MACHINERY.

S1 ECIFICATION forming part of Letters Patent N 0. 702,934, dated June24, 1902.

Application filed January 28,1901. Serial No. 44,422. (No model.)

To all whmn it may concern:

Be it known that I, FRANKLIN ALFRED ER- RINGTON, a citizen of the UnitedStates of America, residing in New York city, borough of Richmond, Stateof New York, (post-office Stapleton,) have invented certain new anduseful Improvements in Stud-Settinglliachincry, of which the followingis a specification.

My invention relates, broadly, to means for connecting and disconnectingshafts while rotating, and more particularly to means forelasticallycentering a retaining-spring to prevent its exposure tobreakage, to means for automatically tightening and releasing a stud ina stud-holder, and to other details of improvements and combinations ofparts hereinafter described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming parthereof, wherein- Figure 1 is a vertical cross-section of a deviceembodying my invention, the parts being shown with the stud-setter inthe idle position, except that the spring and its connec-' tions areillustrated in the stud-releasing position, the spring being undertension and the threaded parts slack. Fig. 2 is a similar view of theparts, illustrating the stud-setter in the driving position, the springbeing relaxed and the threaded parts under tension. Fig. 3 is atop planview of Fig. 1. Fig. 4 is a similar View of the friction-driven disk,the drivingspindle, check-washer, and adj usting-nut being removed toshow the retaining-spring surrounded by its centering-spring within therigid walls of the spring-recess, the parts being illustrated in theirnormal positions, as seen in Fig. 1; and Fig. 5 is a similar viewshowing the retaining and centering springs expanded during the passageof the enlarged portion of the stud-holder shank through them.

Similar numerals of reference indicate corresponding parts in theseveral views.

1 is a shank of a driving friction-disk 1, provided with an axial socket1 An internally-screw-threaded cup-shaped frictiondriven disk 2surrounds the friction drivingdisk 1 and is shown slotted on one side at2 and provided at its bottom with clutches, preferably shown in the formof clutch-pins 2, the projecting portions of which are pref= erablyshown undercut. An axial bore 2" registers with socket 1". A fiberfrictionwasher 3 is preferably interposed between the disks 1 and 2 andprovided with an axial bore 3 (shown of greater diameter than the socket1 2) to form a concentrically-located springrecess 3" in the side wallsof socket 1" 2* to receive an expansible annular retainingspring 4,preferably shown as a spiral spring having its ends joined together,said spring 4 being surrounded by a flat rectangularshapedcentering-spring 5, Fig. 4. An exter nally-screw-threaded adjusting-nut6 surrounds the shank 1 and meshes with the internal screw-threads offriction-driven disk 2, and between disk 1 and nut G I interpose a fibercheck-washer 7, having a lug 7, that meshes with the slot 2?.

A stud-setter 8 is provided with a shank 8, having a reduced slideway 8and a shoulder 8 at the junction of said reduced slideway and the upperenlarged portion of shank S.

A disk 8 of the stud-setter is shown pierced by clutch-holes 8 adaptedto receive clutchpins 2. A shaft 9 is shown projecting from disk 8 andhaving screw-threads 9 at its lower portion to mesh with correspondingscrew-threads 10 at one end of a stud-holder 10. The other end of thestud-holder is provided with screw-threads 10 of a finer pitch than 10to mesh with those 11 of astud 11. The screw-threads l0 are preferablyshown carried by a removable stud-nut 10, which is connected to rotatewith stud-holder 10 by a pin 10 projecting from the side wall of recess10 into a suitable slot in the periphery of stud-nut 10. An opening 10in the bottom plate 10 of stud-holder 1O admits the stud 11 to mesh withscrew-threads 10. A lug lO projects from stud-holder 10 to engage aprojection or projections 9, carried by shaft 9, to limit the movementof holder 10 upon shaft 9. A spiral spring 12 is preferably employed toactuate the screw-threaded parts 9 and 10 to bring the inner face 10 ofthe stud-nut against the outer end face 9 of shaft 9 upon the removal ofone stud 11 to make ready for the setting of the next stud; but theoperator may grasp the holder 10 by hand and screw it upon shaft 9, ifdesired, and thereby omit spring 12 and its automatic function. Theconstruction of the parts may I other.

be varied without departing from the spirit of my invention.

The operation of, the parts is as follows: The friction-driven disk 2 isclamped with more or less pressure to the friction-driven disk 1,according to the size of the stud to be set, by turning nut 6, say,byasuitable wrench applied at holes 6. The slip-joint connection of lug'7 with slot 2 prevents the slipping of disk 1 from altering theposition of the adjusting members 6 2 relatively with each The upper endof the shank S is preferably tapered to expand the annularretaining-spring 4 and its centering-spring 5 to pass the enlargedportion of the shank 8, (see Fig. 5,) and said springs will contractunder shoulder 8, Figs. 2, 4, before the clutch-pins 2 engageclutch-openings 8 to enable the studsetter 8 to be supported and looselycentered with shank 1 and socket 1 by annular spring 4, yet not berotatively connected with disk 2, so that all danger of turning in theoperators hand is obviated. that spiral spring 4 is liable to breakageby the entrance of shank S, and I have invented elastic walls 5,arranged in angular form and adapted to connect the annularretainingspring 4 with the rigid side walls of the springrecess 3 insuch a manner as to retain the spring 4 in a position concentric withthe socket 2; I preferably form the elastic angular walls 5 by using aflatspring or springs 5, and for purposes of illustration I have shown astyle of spring that can be made in one piece, the unjoined ends beingshown projecting outwardly in V shape to secure a hearing of that side'of the elastic angular form upon the rigid side walls of thespringrecess 3, for the reason that it is desirable to use a form ofcentering-spring 5 that can be readily inserted and removed from recess3 through the opening 2' without taking the device apart; but it isobvious that the centering-spring 5 can be formed in other ways thanthat shown that will be able to perform the function of the singlecentering-spring 5 and still come within the spirit of my invention. Bythe combination of a retaining and centering springs 4 5 all lateralpressure of a retaining-spring as previously known upon a shaft 8 isavoided, the rectangular centering-spring 5 to guard against thisbreakage by keeping the annular spring 4 concentrio with the opening 2To enable centering-spring 5 to be readily inserted and removed fromrecess 3 through opening 2, I have avoided connecting the ends of saidcentering-spring together, but have preferably projected them outward inV shape to practically secure the same effect as if the ends were joinedtogether and the centeringspring 5 was a complete rectangle. I thussecure a rectangular readily-removable centering-spring 5, that forms anelastic connection between the rigid walls of the recess 3 and theexpansible retaining-spring 4, whereby said retaining-spring 4 iselastically cen- Practice has shown tered with the socket 1 2. All thelateral pressure of previously known retainingsprings is thuseradicated. Upon the end 11? of stud 11 being pressed against Work13tl1e shank S rises in socket 1 and the drivingclutches 2 8automatically slip into engagementto rotate the stud-setter 8 to theright hand, (in the construction shown,) whereupon the end 11' of thestud 11 will screw up into nut 10 until said end 11 will press againstthe outer end 9 of shaft 9, which pressure. slacks the tension onthreads 9 10 and yet maintains the friction of the threads 11 10 at themaximum to screw stud 11 into the hole 13 of the work. When the stud 11is set fast in the hole 13, the shank 1: and all its connections arethereupon rotated in the opposite direction, which unscrews the shaft 9from stud-holder 10 and compresses spring 2 until the lugs 9 10 arrestthe further unscrewing of the stud-holder. This relative movement of theparts 9 1O automatically relieves the pressure of the end ofthe stud 11from the end of the shaft 9, so that the stud 11 is unscrewed from thestud-nut 10 without any back pressure on the stud-11 of sufficientamount to endanger loosening it in the hole 13 As soon as the frictionof the threads of stud 11 and stud-nut 1O cease to hold the lugs 0 10'in engagement the spring 12 automatically screws up the stud-holder 10.

upon the shaft 9 to bring the face 1O against the face 9 ready for theinserting of the next stud. A slight push ahead by the operators hand inthe direction of rotation will disengage the clutches 2 from theclutch-openings 8 without stopping the rotation of shank 1, whereuponthe stud-setter S will drop down in the socket 1 2 until theretaining-spring 4 engages the shoulder 8 ,whereupon the studsetter 8will resume the position shown in Fig. 1, where itcan be grasped andwithdrawn from socket 1 without danger of turning in the operators hand,although the shank. 1 continues to rotate.

Having now described my invention, what I claim is l 1. A part having asocket the side walls of which are indented by a concentric springrecesshaving rigid side walls, anexpansible annular spring located in saidspring-recess, and a centering spring or springs interposed between saidannular spring and said rigid side walls of said recess and adapted toelas- IIC tically center said annular spring with said socket,substantially as described.

2. A part having a socket the side walls of which are indented by aconcentric springrecess having rigid side walls, an expansible annularspring located in said spring-recess, a centering spring or springsinterposed be tween said annular spring and said rigid side walls of therecess, and a shaft adapted to expand said annular spring and beelastically centered thereby with said socket, substantially asdescribed.

3. A part having a socket the side walls of which are indented by aconcentric springrecess having rigid side walls, an expansible annularspring located in said spring-recess, a centering spring or springsinterposed between said annular spring and said rigid side walls of saidrecess, a shaft adapted to expand said annular spring and having ashoulder to coact with said annular spring to support said shaft in saidsocket, substantially as described.

4. A part having a socket the side walls of which are indented by aconcentric springrecess having rigid side walls, an expansible annularspring located in said spring-recess, and a centering spring or springsarranged in angular form and interposed between said annular spring andsaid rigid side walls of said recess, the central inner surfaces of thecentering spring or springs being adapted to engage the periphery of theannular spring and the corners of the angular form being adapted toengage said rigid side walls of said springrecess, substantially asdescribed.

5. A part having a socket the side walls of which are indented by aconcentric springrecess having rigid side walls, an expansible annularspring located in said spring-recess, and a centering spring or springsarranged in angular form and interposed between said annular spring andsaid rigid walls of said recess,the ends of the centering spring orsprings being unattached to facilitate the insertion and removal thereoffrom said recess, substantialy as described.

6. A part having a socket the side walls of which are indented by aconcentric springrecess having rigid side walls, an expansible annularspring located in said spring-recess, and a centering spring or springsarranged in angular form and interposed between said annular spring andsaid rigid walls of said recess, the ends of the centering-spring beingbent outward to hold said angular form in position to elastically centerthe annular spring, substantially as described.

7. A part having a socket the side walls of which are indented by aconcentric springrecess having rigid side walls, an expansible annularspring located in said recess, a centering spring or springs interposedbetween the annular spring and the rigid walls of the recess to form anelastic connection between said rigid walls and said annular spring, ashaft, rotary driving-clutches carried by said socketed part and by saidshaft, said shaft having a shoulder so located along its periphery as topermit said annular spring to grip under said shoulder before saidclutches become engaged, substantially as described.

8. A screw-threaded shaft, a stud-holder provided at one end withscrew-threads to mesh with those of a stud and at the other end withscrew-threads of a coarser pitch to mesh with the correspondingly-coarsescrewthreads of the shaft, substantially as described.

O. A screw-threaded shaft, a stud-holder provided at one end withscrew-threads to mesh with those of a stud and at the other end withscrew-threads to mesh with those of the shaft, said shaftand saidstud-holder having suitable projections to engage each other to limitthe independent rotation of said parts, substantially as described.

10. A screw-threaded shaft, a stud-holder provided at one end withscrew-threads to mesh with those of a stud and at the other end withscrew-threads to mesh with those of the shaft, and a spring to rotatesaid stud-- holder upon said shaft to screw said shaft into said holderautomatically after said screwthreaded partshave been partly unscrewedfrom each other, substantially as described.

11. A screw-threaded shaft, a stud-holder provided with screw-threadsthat mesh with those of said shaft, aremovable stud-nut connected torotate with said stud-holder, said stud-nut being internallyscrew-threaded to mesh with the threads of a stud, substan-' tially asdescribed.

12. A screw-threaded shaft, a stud-holder provided at one end with aremovable stud nut having internal screw-threads of a finer pitch thanthose on said shaft and atthe other end with screw-threads of acorrespondinglycoarse pitch with those of said shaft,'substantially asdescribed.

F. A. ERRINGTON.

